LCD panel and method for manufacturing the same

ABSTRACT

The present invention discloses a liquid crystal display (LCD) panel, which includes an array substrate; a color filter (CF) substrate disposed opposite to the array substrate; and a spacer disposed between the array substrate and the CF substrate. The spacer includes a columnar platform and a recessed platform, and the columnar platform and the recessed platform engage each other. The present invention further discloses a method for manufacturing the LCD panel.

FIELD OF THE INVENTION

The present invention relates to a liquid crystal display (LCD)technology, and especially to an LCD panel and a method formanufacturing the same.

BACKGROUND OF THE INVENTION

A conventional LCD panel includes a color filter (CF) substrate, anarray substrate, and liquid crystals. The CF substrate includes a firstglass substrate, a black matrix (BM) layer, a color-pattern layer, and atransparent electrode (indium tin oxide, ITO) layer. All of the firstglass substrate, the BM layer, the color-pattern layer, and thetransparent electrode layer are laminated into one body in sequence. Thearray substrate includes a second glass substrate, a gate line layer, aninsulative layer, a semiconductor layer, a metal layer, and apassivation layer. All of the second glass substrate, the gate linelayer, the insulative layer, the semiconductor layer, the metal layer,and the passivation layer are laminated into one body in sequence.

The CF substrate and the array substrate of the conventional. LCD panelare spaced out by spacers (photo spacers). The CF substrate and thearray substrate are laminated and assembled together; moreover; a gapexists because the spacers are disposed therebetween. The liquidcrystals are disposed in the gap. While contact area between the spacersand the array substrate is too large, a friction area is also large.Because the spacers sustain a larger friction, it is easy to cause atouch defect. Thus, the LCD panel is not easy to recover after thetouch.

The conventional spacers are located on thin-film transistors. Thespacers exert a force on the thin-film transistors when the spacers aregiven a force. That is likely to damage the thin-film transistors, suchthat a partial region of the LCD panel can not display images correctly.

The typical LCD panel is disposed vertically for utilization. When theLCD panel expands by heat and an elasticity of the spacers therein isinadequate, the liquid crystals flow downward due to an action ofgravitation, such that a defect appears during the display. In addition,when the LCD panel is subjected to a compression test to determineendurance thereof, a predetermined pressure is applied on a specificregion of the LCD panel. The spacers may be crushed due to theinadequate elasticity of the spacers, resulting in a defect of impressedspots.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide an LCD panel, whichcan prevent thin-film transistors or pixel electrodes from damage when auser touches the LCD panel, and can make the LCD panel quickly recoverafter the touch, thereby ensuring a stable display quality.

To achieve the foregoing objective, the present invention provides anLCD panel, which includes: an array substrate; a CF substrate disposedopposite to the array substrate; and a spacer disposed between the arraysubstrate and the CF substrate. The spacer includes a columnar platformand a recessed platform, and the columnar platform and the recessedplatform engage each other. The columnar platform is disposed on oneside of the array substrate, and the recessed platform is disposed onone side of the CF substrate. The columnar platform is located on a gateline of the array substrate. The columnar platform is formed on thearray substrate by a halftone exposure process. The recessed platform isformed on the CF substrate by a halftone exposure process.

In the above-mentioned LCD panel, the columnar platform is furtherdisposed on the CF substrate, and the recessed platform is furtherdisposed on the array substrate.

In the above-mentioned LCD panel, the recessed platform is located on agate line of the array substrate.

In the above-mentioned LCD panel, a shape of a top surface of thecolumnar platform fits a shape of a concave surface of the recessedplatform.

In the above-mentioned LCD panel, an area of the concave surface of therecessed platform is larger than an area of the top surface of thecolumnar platform.

Another objective of the present invention is to provide an LCD panel,which can prevent thin-film transistors or pixel electrodes from damagewhen a user touches the LCD panel, and can make the LCD panel quicklyrecover after the touch, thereby ensuring a stable display quality.

To achieve the foregoing objective, the present invention provides anLCD panel, which includes: an array substrate; a CF substrate disposedopposite to the array substrate; and a spacer disposed between the arraysubstrate and the CF substrate, the spacer comprising a columnarplatform and a recessed platform, the columnar platform and the recessedplatform engaging each other.

In the above-mentioned LCD panel, the columnar platform is disposed onone side of the array substrate, and the recessed platform is disposedon one side of the CF substrate.

In the above-mentioned LCD panel, the columnar platform is located on agate line of the array substrate.

In the above-mentioned LCD panel, the columnar platform is disposed onone side of the CF substrate, and the recessed platform is disposed onone side of the array substrate.

In the above-mentioned LCD panel, the recessed platform is located on agate line of the array substrate.

Yet another objective of the present invention is to provide a methodfor manufacturing an LCD panel, which can prevent thin-film transistorsor pixel electrodes from damage when a user touches the LCD panel, andcan make the LCD panel quickly recover after the touch, thereby ensuringa stable display quality.

To achieve the foregoing objective, the present invention provides amethod for manufacturing an LCD panel. The method includes the followingsteps of: (A) using a halftone exposure process to form a recessedplatform on a first substrate; (B) using a halftone exposure process toform a columnar platform on a second substrate; (C) assembling andlaminating the first substrate and the second substrate, wherein thecolumnar platform and the recessed platform engage each other; and (D)filling liquid crystals between the first substrate and the secondsubstrate.

In the above-mentioned method for manufacturing the LCD panel, the firstsubstrate is a color filter (CF) substrate, and the second substrate isan array substrate.

In the above-mentioned method for manufacturing the LCD panel, the arraysubstrate includes a pixel electrode, a thin-film transistor, a dataline, and a drain line. The method further includes the following stepof: (E) forming the columnar platform on a gate line of the arraysubstrate in one of forming processes of the pixel electrode, thethin-film transistor, the data line, and the drain line of the arraysubstrate.

In the above-mentioned method for manufacturing the LCD panel, the firstsubstrate is an array substrate, and the second substrate is a CFsubstrate.

In the above-mentioned method for manufacturing the LCD panel, the arraysubstrate includes a pixel electrode, a thin-film transistor, a dataline, and a drain line. The method further includes the following stepof: (F) forming the recessed platform on a gate line of the arraysubstrate in one of forming processes of the pixel electrode, thethin-film transistor, the data line, and the drain line of the arraysubstrate.

In the present invention, because the columnar spacer is disposed abovethe gate line and/or the data line, the spacer does not exert a force onthe thin-film transistor or the pixel electrode to damage then when thespacer are given a force in comparison with the prior art. This is anadvantage for ensuring the stable display quality. In addition, thecolumnar spacer includes the columnar platform and the recessedplatform, and the columnar spacer consists of the columnar platform andthe recessed platform that engage each other. Therefore, after the arraysubstrate and the CF substrate that have the columnar platform and therecessed platform disposed thereon are assembled and laminated, thecolumnar spacer consisting of the columnar platform and the recessedplatform is capable of restricting a slide region of the array substrateand the CF substrate, thereby preventing the partial region of the LCDpanel form sliding and shifting without recovery to decrease the displayquality of the LCD panel after the user touches the LCD panel.Meanwhile, the columnar spacer of the present invention consists of twoportions, the columnar platform and the recessed platform. A combinationof both can increase the elasticity and the resist pressure of thecolumnar spacer

It is to be understood that both the foregoing general description andthe following detailed description of the present invention areexemplary and explanatory and are intended to provide furtherexplanation of the invention as claimed.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic drawing illustrating a position of a spacer in anLCD panel of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A′ in FIG. 1according to a first preferred embodiment;

FIG. 3 is a cross-sectional view taken along line A-A′ in FIG. 1according to a second preferred embodiment; and

FIG. 4 is a flow chart illustrating a method for manufacturing the LCDpanel of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Descriptions of the following embodiments refer to attached drawingswhich are utilized to exemplify specific embodiments.

Referring to FIG. 1, FIG. 1 is a schematic drawing illustrating aposition of a spacer 102 in an LCD panel of the present invention. Toobserve the LCD panel of the present invention in a top view, as shownin FIG. 1, the array substrate 202 of the present invention has a gateline 104, a data line 105, a thin-film transistor 101, a drain line 103,and a pixel electrode 106. The spacer 102 is located at the front of thegate line 104 of the array substrate 202 (to observe the LCD panel ofthe present invention in a top view). The spacer 102 of the presentinvention also can be located at the front of the data line 105.

In the LCD panel of the present invention, the spacer 102 is positionedabove the gate line 104 (in a cross-sectional view taken along lineA-A′) and/or above the data line 105. Hence, the spacer 102 does notexert a force on the thin-film transistor 10 or the pixel electrode 106to damage them when the spacer 102 are given a force in comparison withthe prior art. This is an advantage for ensuring a stable displayquality.

FIG. 2 and FIG. 3 illustrate the spacer 102 being positioned above thegate line 104 exemplarily. Circumstances with regard to the spacerdisposing on the data line 105 can be implemented by referring to thedescription of FIG. 2 and FIG. 3.

Referring to FIG. 2, FIG. 2 is a cross-sectional view taken along lineA-A′ in FIG. 1 according to a first preferred embodiment. In theembodiment, the LCD panel of the present invention includes a colorfilter (CF) substrate 201, the array substrate 202, the spacer 102, andliquid crystals (not shown). The CF substrate 201 and the arraysubstrate 202 are laminated up and down to form a space. The spacer 102is disposed 202 between the CF substrate 201 and the array substrate202, and the liquid crystals are filled between the CF substrate 201 andthe array substrate 202. The CF substrate 201 includes a first glasssubstrate 203, a BM layer 204, a color-pattern layer 205, and atransparent electrode layer 206. The array substrate 202 includes asecond glass substrate 215, a gate line layer 104, an insulative layer214, a semiconductor layer 212, a metal layer 211 and a passivationlayer 213. The spacer 102 includes a columnar platform and a recessedplatform. The columnar platform and the recessed platform arerespectively disposed on two opposite sides of the array substrate andthe CF substrate and engage each other, and/or the columnar platform andthe recessed platform are respectively disposed on the two oppositesides of the CF substrate and the array substrate and engage each other.In the embodiment, the columnar platform is a first columnar platform209, and the recessed platform is a first recessed platform 207. Thatis, in the embodiment, the spacer 102 includes the first columnarplatform 209 and the first recessed platform 207. The first recessedplatform 207 is disposed on the transparent electrode layer 206 of theCF substrate 201, and the first columnar platform 209 is disposed on theinsulative layer 214 of the array substrate 202. The position of thefirst recessed platform 207 on the CF substrate 201 corresponds to theposition of the first columnar platform 209 on the array substrate 202.The spacer 102 is a superimposed combination of the first recessedplatform 207 and the first columnar platform 209. Specifically, thefirst recessed platform 207 has a concave surface 208, and the firstcolumnar platform 209 has a top surface 210. A shape of the concavesurface 208 fits a shape of the top surface 210. That is, the top of thefirst columnar platform 209 can be disposed into the recess of the firstrecessed platform 207. The concave surface 208 of the first recessedplatform 207 fits the top surface 210 of the first columnar platform209. An area of the concave surface 208 of the recessed platform 207 islarger than an area of the top surface 210 (after adding the passivationlayer 213) of the columnar platform 209. The first recessed platform 207and the first columnar platform 209 are inserted together (engage eachother). Specifically, the first columnar platform 209 is inserted intothe first recessed platform 207. The columnar platform is disposed onthe gate line 104 of the array substrate 202. The first columnarplatform 209 includes a passivation layer 213, a metal layer 211, and asemiconductor layer 212. The first columnar platform 209 is formed withthe semiconductor layer 212 and the metal layer 211 by the processes ofcoating photoresist, pre-bake, exposure through a halftone mask,development, post-bake, etching, photoresist lift off, and so on.

Referring to FIG. 3, FIG. 3 is a cross-sectional view taken along lineA-A′ in FIG. 1 according to a second preferred embodiment. In theembodiment, the LCD panel of the present invention includes a colorfilter (CF) substrate 201, the array substrate 202, the spacer 102, andliquid crystals (not shown). The CF substrate 201 and the arraysubstrate 202 are laminated up and down to form a space. The spacer 102is disposed 202 between the CF substrate 201 and the array substrate202, and the liquid crystals are filled between the CF substrate 201 andthe array substrate 202. The CF substrate 201 includes a first glasssubstrate 203, a BM layer 204, a color-pattern layer 205, and atransparent electrode layer 206. The array substrate 202 includes asecond glass substrate 215, a gate line layer 104, an insulative layer214, a semiconductor layer 212, a metal layer 211 and a passivationlayer 213. The spacer 102 includes a columnar platform and a recessedplatform. In the embodiment, the columnar platform is a second columnarplatform 301, and the recessed platform is a second recessed platform302. That is, in the embodiment, the spacer 102 includes the secondcolumnar platform 301 and the second recessed platform 302. The secondcolumnar platform 301 and the second recessed platform 302 arerespectively disposed on the two opposite sides of the array substrate202 and the CF substrate 201 and engage each other, and/or the secondcolumnar platform 301 and the second recessed platform 302 arerespectively disposed on the two opposite sides of the CF substrate 201and the array substrate 202 the and engage each other. The secondcolumnar platform 301 is disposed on the transparent electrode layer 206of the CF substrate 201, and the second recessed platform 302 isdisposed on the insulative layer 214 of the array substrate 202. Theposition of the second columnar platform 301 on the CF substrate 201corresponds to the position of the second recessed platform 302 on thearray substrate 202. The spacer 102 is a superimposed combination of thesecond columnar platform 301 and the second recessed platform 302.Specifically, the second recessed platform 302 has a concave surface305, and the second columnar platform 301 has a top surface 303. A shapeof the concave surface 305 fits a shape of the top surface 303. That is,the top surface 303 of the second columnar platform 301 can be disposedinto the recess of the second recessed platform 302. The top surface ofthe second columnar platform 301 fits the concave surface 305 of thesecond recessed platform 302. An area of the concave surface 305 (afteradding the passivation layer 213) of the second recessed platform 302 islarger than an area of the top surface 303 of the second columnarplatform 301. The second recessed platform 302 and the second columnarplatform 301 are inserted together (engage each other). Specifically,the second columnar platform 301 is inserted into the second recessedplatform 302. The recessed platform is disposed on the data line 105 ofthe array substrate 202. The second recessed platform 302 includes apassivation layer 213, a metal layer 304, and a semiconductor layer 306.The second recessed platform 302 disposed on the array substrate 202 isformed with the semiconductor layer 212 and the metal layer 211 by theprocesses of coating photoresist, pre-bake, exposure through a halftonemask, development, post-bake, etching, photoresist lift off, and so on.

In the first and second preferred embodiments, any one of the firstcolumnar platform 209 and the second recessed platform 302 can beindividually disposed on the array substrate 202, also both the firstcolumnar platform 209 and the second recessed platform 302 can bedisposed thereon. Any one of the first recessed platform 207 and thesecond columnar platform 301 can be individually disposed on the CFsubstrate 202, also both the first recessed platform 207 and the secondcolumnar platform 301 can be disposed thereon. The positions of thefirst columnar platform 209 and the second recessed platform 302 on thearray substrate 202 correspond to the positions of the first recessedplatform 207 and second columnar platform 301 on the CF substrate 201.

Referring to FIG. 4, FIG. 4 is a flow chart illustrating a method formanufacturing the LCD panel of the present invention. At step 401, thestep is to determine (calculate) positions of the spacer 102 on thefirst substrate and the second substrate, that is, to determine(calculate) data with respect to a height of the first recessed platform207, a depth, a shape, and a bottom area of the recess of the firstrecessed platform 207, the position of the first recessed platform 207on the CF substrate 201, and so on and/or to determine (calculate) datawith respect to a height of the second columnar platform 301, the areaof the top surface, the position, and so on of the second columnarplatform 301 on the CF substrate 201, and to determine (calculate) datawith respect to a height, the area of the top surface, the position ofthe second columnar platform 301 on the array substrate 202, and so onand/or to determine (calculate) data with respect to a height of thesecond recessed platform 302, a depth, a shape, and a bottom area of therecess, the position of the second recessed platform 302 on the arraysubstrate 202, and so on. The first columnar platform 209 and/or theposition of the second recessed platform 302 are/is positioned on thegate line 104 and/or the data line 105 on the array substrate 202.

At step 402, the step is to use a halftone exposure process to form arecessed platform on the first substrate, which is a CF substrate.Actually, a columnar platform also can be formed on the CF substrate bythe halftone exposure process. Specifically, to provide the first glasssubstrate 203, the BM layer 204, the color-pattern layer 205, and thetransparent electrode layer 206 are disposed on the first glasssubstrate 203 in sequence. Then a spacer material layer is coated overthe transparent electrode layer 206 and then the spacer material layeris processed by pre-baking, exposing through a halftone mask, developingby alkaline solution, post-baking, and so on, thereby forming thecolumnar platform and/or the recessed platform, so as to form the CFsubstrate 201. The specific step for forming the first recessed platform207 and/or the second columnar platform 301 on the CF substrate 201 isthe following. First, a spacer material layer is coated over thetransparent electrode layer 206 of the CF substrate 201. A thickness ofthe spacer material layer is the calculated height of the first recessedplatform 207 and/or the height of the second columnar platform 301. Thenthe spacer material layer is processed by pre-baking, exposing through ahalftone mask, developing by alkaline solution, post-baking, and so onaccording to the calculated position of the first recessed platform 207on the CF substrate 201, thereby forming a columnar platform. Then thecolumnar platform is processed by pre-baking, exposing through ahalftone mask, developing by alkaline solution, post-baking, and so onaccording to the calculated depth, shape, and area of the recess of thefirst recessed platform 207, so that a recess is formed on the columnarplatform, so as to form the first recessed platform 207; and/or thespacer material layer is processed by pre-baking, exposing through ahalftone mask, developing by alkaline solution, post-baking, etc. on theCF substrate 201 according to the calculated area and shape of the topsurface of the second columnar platform 301, so as to form the secondcolumnar platform 301.

At step 403, the step is to use a halftone exposure process to form acolumnar platform on the second substrate, which is the array substrate.Actually, a recessed platform also can be formed on the array substrateby the halftone exposure process. Specifically, a second glass substrate215 is provided, and the gate line layer 104, the insulative layer 214,the semiconductor layer 212, and the metal layer 211 are disposed on thesecond glass substrate 215 in sequence. In the processes of disposingthe semiconductor layer 212 and the metal layer 211, the semiconductorlayer 212 and the metal layer 211 are processed by pre-baking, exposingthrough a halftone mask, developing by alkaline solution, post-baking,and so on. Then the passivation layer 213 is disposed on thesemiconductor layer 212 and the metal layer 211 to form the recessedplatform and/or the columnar platform, so as to form the array substrate202. The specific step for forming the first columnar platform 209and/or the second recessed platform 302 on the gate line 104 and/or thedata line 105 of the array substrate 202 is the following. First, asemiconductor layer 212 and a metal layer 211 are respectively depositedon the insulative layer 214 of the array substrate 202, and thephotoresist is coated thereon. The total thickness of the semiconductorlayer 212 and the material layer is the calculated height of the firstcolumnar platform 209 and/or the height of the second recessed platform302. Then the semiconductor layer 212, the metal layer 211, and thephotoresist layer are processed by pre-baking, exposing through ahalftone mask, developing, post-baking, etching, photoresist lift off,and so on according to the calculated area and shape of the top surfaceof the first columnar platform 209, so as to form the first columnarplatform 209; and/or the semiconductor layer 212, the metal layer 211,and the photoresist layer are processed by pre-baking, exposing througha halftone mask, developing, post-baking, etching, photoresist lift off,and so on according to the calculated position of the second recessedplatform 302 on the array substrate 202, so as to form the a columnarplatform. Then the columnar platform is processed by pre-baking,exposing through a halftone mask, developing, post-baking, etching,photoresist lift off, and so on according the calculated depth, shape,and area of the recess of the second recessed platform 302, so that arecess is formed on the columnar platform, so as to form the secondrecessed platform 302. The passivation layer 213 is deposited on oneside of the array substrate 202 facing the CF substrate 201, i.e. theside that has the first columnar platform 209 and/or the second recessedplatform 302. The step for forming the first columnar platform 209and/or the second recessed platform 302 on the gate line 104 and/or thedata line 105 of the array substrate 202 can be simultaneously performedwith the process of forming any one of the pixel electrode 106, thethin-film transistor 101, the data line 105, and the drain line 103, orcan be independently performed during the process of forming any one ofthe pixel electrode 106, the thin-film transistor 101, the data line105, and the drain line 103.

At step 404, the step is to laminate and assemble the CF substrate 201and the array substrate 202 together, That is, the first recessedplatform 207 and/or the second columnar platform 301 on the CF substrate201 are aligned with and inserted into the first columnar platform 209and/or the second recessed platform 302 on the array substrate 202(engage each other). Specifically, the first columnar platform 209 has atop surface 210, and the first recessed platform 207 has a concavesurface 208. An area of the concave surface 208 is larger than an areaof the top surface 210, and the top surface 210 of the first columnarplatform 209 fits the concave surface 208 of the first recessed platform207, And/or, the second columnar platform 301 has a top surface 303, andthe second recessed platform 302 has a concave surface 305. An area ofthe concave surface 305 is larger than an area of the top surface 303,and the top surface 303 of the second columnar platform 301 fits theconcave surface 305 of the second recessed platform 302.

At step 405, the step is to fill the liquid crystals between the CFsubstrate 201 and the array substrate 202.

In the present invention, the spacer 102 includes the columnar platformand the recessed platform, and the columnar spacer consists of thecolumnar platform and the recessed platform that engage each other.Therefore, after the array substrate 202 and the CF substrate 201 thathave the columnar platform and the recessed platform disposed thereonare assembled and laminated, the spacer 102 consisting of the columnarplatform and the recessed platform is capable of restricting the slideregion of the array substrate 202 and the CF substrate 201, therebypreventing the partial region of the LCD panel form sliding and shiftingwithout recovery to decrease the display quality of the LCD panel afterthe user touches the LCD panel. Meanwhile, the spacer 102 of the presentinvention consists of two portions, the columnar platform and therecessed platform. The combination of both can increase the elasticityand the resist pressure of the spacer 102.

While the preferred embodiments of the present invention have beenillustrated and described in detail, various modifications andalterations can be made by persons skilled in this art. The embodimentof the present invention is therefore described in an illustrative butnot restrictive sense. It is intended that the present invention shouldnot be limited to the particular forms as illustrated, and that allmodifications and alterations which maintain the spirit and realm of thepresent invention are within the scope as defined in the appendedclaims.

What is claimed is:
 1. A liquid crystal display (LCD) panel, comprising:an array substrate; a color filter (CF) substrate disposed opposite tothe array substrate; and a spacer disposed between the array substrateand the CF substrate, the spacer comprising a columnar platform and arecessed platform having a recess portion and a peripheral portionsurrounding the recess portion, the columnar platform and the recessedplatform engaging each other, wherein the columnar platfatin is insertedinto the recess portion of the recessed platform and fits the recessportion, wherein the columnar platform has a surface contacting asurface of the recess portion of the recessed platform and the twosurfaces are flat surfaces, and wherein the recessed platform isconstructed by a passivation layer, a metal layer, and a semiconductorlayer stacked one above another; the columnar platform disposed on oneside of the CF substrate, the recessed platform disposed on one side ofthe array substrate; the recessed platform located on a gate line or adata line of the array substrate, wherein the passivation layer of therecessed platform contacts the semiconductor layer in an areacorresponding to the surface of the recess portion of the recessedplatform, and the metal layer is formed between the passivation layerand the semiconductor layer to surround the surface of the recessportion of the recessed platform.
 2. The LCD panel according to claim 1,wherein the columnar platform is further disposed on the arraysubstrate, and the recessed platform is further disposed on the CFsubstrate.
 3. The LCD panel according to claim 2, wherein the columnarplatform is located on a gate line or a data line of the arraysubstrate.
 4. The LCD panel according to claim 1, wherein an area of thesurface of the recess portion of the recessed platform is larger than anarea of the tep surface of the columnar platform.
 5. An LCD panel,comprising: an array substrate; a CF substrate disposed opposite to thearray substrate; and a spacer disposed between the array substrate andthe CF substrate, the spacer comprising a columnar platform and arecessed platform having a recess portion and a peripheral portionsurrounding the recess portion, the columnar platform and the recessedplatform engaging each other, wherein the columnar platform is insertedinto the recess portion of the recessed platform and fits the recessportion, wherein the columnar platform has a surface contacting asurface of the recess portion of the recessed platform and the twosurfaces are flat surfaces, and wherein the recessed platform isconstructed by a passivation layer, a metal layer, and a semiconductorlayer stacked one above another, wherein the passivation layer of therecessed platform contacts the semiconductor layer in an areacorresponding to the surface of the recess portion of the recessedplatform, and the metal layer is formed between the passivation layerand the semiconductor layer to surround the surface of the recessportion of the recessed platform.
 6. The LCD panel according to claim 5,wherein the columnar platform is disposed on one side of the CFsubstrate, and the recessed platform is disposed on one side of thearray substrate.
 7. The LCD panel according to claim 6, wherein therecessed platform is located on a gate line or a data line of the arraysubstrate.